package com.pitchedapps.frost.web

import android.annotation.SuppressLint
import android.content.Context
import android.graphics.Color
import android.os.Build
import android.support.v4.widget.SwipeRefreshLayout
import android.util.AttributeSet
import android.view.View
import android.widget.FrameLayout
import android.widget.ProgressBar
import ca.allanwang.kau.utils.*
import com.pitchedapps.frost.R
import com.pitchedapps.frost.facebook.FbItem
import com.pitchedapps.frost.facebook.USER_AGENT_BASIC
import com.pitchedapps.frost.utils.Prefs
import com.pitchedapps.frost.utils.frostDownload
import io.reactivex.android.schedulers.AndroidSchedulers

/**
 * Created by Allan Wang on 2017-06-01.
 */
class FrostWebView @JvmOverloads constructor(
        context: Context, attrs: AttributeSet? = null, defStyleAttr: Int = 0, defStyleRes: Int = 0
) : FrameLayout(context, attrs, defStyleAttr, defStyleRes), SwipeRefreshLayout.OnRefreshListener {

    val refresh: SwipeRefreshLayout by bindView(R.id.swipe_refresh)
    val web: FrostWebViewCore by bindView(R.id.frost_webview_core)
    val progress: ProgressBar by bindView(R.id.progress_bar)

    init {
        inflate(getContext(), R.layout.swipe_webview, this)
        progress.tint(Prefs.textColor.withAlpha(180))
        refresh.setColorSchemeColors(Prefs.iconColor)
        refresh.setProgressBackgroundColorSchemeColor(Prefs.headerColor.withAlpha(255))
        web.progressObservable.observeOn(AndroidSchedulers.mainThread()).subscribe {
            progress.invisibleIf(it == 100)
            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) progress.setProgress(it, true)
            else progress.progress = it
        }
        web.refreshObservable.observeOn(AndroidSchedulers.mainThread()).subscribe {
            refresh.isRefreshing = it
            refresh.isEnabled = true
        }
        refresh.setOnRefreshListener(this)
        addOnAttachStateChangeListener(object : OnAttachStateChangeListener {
            override fun onViewDetachedFromWindow(v: View) {
                web.visible()
            }

            override fun onViewAttachedToWindow(v: View) {}
        })
    }

    @SuppressLint("SetJavaScriptEnabled")
    fun setupWebview(url: String, enum: FbItem? = null) {
        with(web) {
            baseUrl = url
            baseEnum = enum
            with(settings) {
                javaScriptEnabled = true
                if (url.shouldUseBasicAgent)
                    userAgentString = USER_AGENT_BASIC
                allowFileAccess = true
                textZoom = Prefs.webTextScaling
            }
            setLayerType(View.LAYER_TYPE_HARDWARE, null)
            frostWebClient = baseEnum?.webClient?.invoke(this) ?: FrostWebViewClient(this)
            webViewClient = frostWebClient
            webChromeClient = FrostChromeClient(this)
            addJavascriptInterface(FrostJSI(this), "Frost")
            setBackgroundColor(Color.TRANSPARENT)
            setDownloadListener(context::frostDownload)
        }
    }

    //Some urls have postJavascript injections so make sure we load the base url
    override fun onRefresh() {
        when (web.baseUrl) {
            FbItem.MENU.url -> web.loadBaseUrl(true)
            else -> web.reload(true)
        }
    }

    fun onBackPressed(): Boolean {
        if (web.canGoBack()) {
            web.goBack()
            return true
        }
        return false
    }
}